Submission #321906

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
321906	2020-11-13 13:55:48	tigicha	Stations (IOI20_stations)	C++17	100 / 100	1156 ms	1292 KiB

stations

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#include<bits/stdc++.h>
using namespace std;
int fix[1005], l;
vector<int>vec[1005], labels;
void dfs(int x, int y){
  fix[x]=1;
  if(y%2==0){
    l++;
    labels[x]=l;
  }
  for(int i=0; i<vec[x].size(); i++)
  if(fix[vec[x][i]]!=1) dfs(vec[x][i], y+1);
  if(y%2==1){
    l++;
    labels[x]=l;
  }
}
std::vector<int> label(int n, int k, std::vector<int>u, std::vector<int>v){
  labels.clear();
  for(int i=0; i<n; i++)
  labels.push_back(-1);
  l=0;
  for(int i=0; i<n; i++){
    vec[i].clear();
    fix[i]=0;
  }
  for(int i=0; i<u.size(); i++){
    vec[u[i]].push_back(v[i]);
    vec[v[i]].push_back(u[i]);
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:11:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for(int i=0; i<vec[x].size(); i++)
      |               ~^~~~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:27:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for(int i=0; i<u.size(); i++){
      |               ~^~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |    for(int i=0; i<c.size()-1; i++)
      |                 ~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61